NFL Commissioner Roger Goodell talks during a press conference at the Hilton Hotel on Sept. 19, 2014 in New York City. Goodell spoke about the NFL's failure to address domestic violence, sexual assault and drug abuse in the league. (Photo by Elsa/Getty Images)

“Unfortunately, over the past several weeks, we have seen all too much of the NFL doing wrong,” he said in his opening statement. “That starts with me.”

The league has faced increasing criticism that it has not acted quickly or emphatically enough. The commissioner reiterated that he botched the handling of the Ray Rice case.

“The same mistakes can never be repeated,” he said.

Goodell said he would meet with NFL Players Association chief DeMaurice Smith next week, and they would work with outside experts to evaluate the league’s policies.

Among the areas that will be examined is Goodell’s role in discipline. The commissioner now oversees all personal conduct cases, deciding guilt and penalties.

“Nothing is off the table,” he said.

Goodell said he believes he has the support of the NFL’s owners, his bosses.

“That has been clear to me,” he said.

Roger Goodell: 'The Same Mistakes Can Never Be Repeated'

The commissioner and some NFL teams have been heavily criticized for lenient or delayed punishment of Rice, Adrian Peterson and other players involved in recent domestic violence cases. Less than three weeks into the season, five such cases have made headlines.

As these cases have come to light, such groups as the National Organization of Women and league partners and sponsors have come down hard on the NFL to be more responsive in dealing with them. Congress also is watching to see how the NFL reacts.

Rice was initially suspended for two games. After defending the punishment at first, Goodell admitted more than a month later that he “didn’t get it right” and announced tougher penalties for future domestic violent incidents.

Then when a video emerged of the assault on his then-fiancee, the Baltimore Ravens cut the star running back and the league banned him indefinitely.

Goodell reiterated Friday that he didn’t believe anybody at the NFL had seen the video before it was published by TMZ. The Associated Press reported last week that a law enforcement official says he sent the video to a league executive five months ago.

Citing Rice’s appeal of his indefinite suspension, Goodell declined to specify Friday how the player’s description of what happened was “inconsistent” with what the video showed — the commissioner’s reason for changing his punishment.

The NFL asked former FBI director Robert Mueller to conduct an investigation into the league’s handling of the Rice case. The law firm where Mueller is now a partner, WilmerHale, has connections to the NFL. Goodell insisted Friday that it wasn’t a conflict of interest because Mueller himself has not previously worked with the league.

Goodell acknowledged he has learned that interviewing Rice and his now-wife together is an inappropriate way to handle a domestic violence case.

Roger Goodell: 'The Same Mistakes Can Never Be Repeated'

The commissioner declined to address whether any women were involved in the decision to suspend Rice for two games, but conceded that’s “exactly what we’re concerned about.”

Goodell said Friday that he will establish a conduct committee. One of the key questions is how to balance the league’s desire to take a stance against violent acts with the due process of the legal system.

In a memo to the clubs late Thursday, Goodell said that within the next 30 days, all NFL and team personnel will participate in education sessions on domestic violence and sexual assault. The memo said the league will work with the union in providing the “information and tools to understand and recognize domestic violence and sexual assault.”

The league will provide financial, operational and promotional support to the National Domestic Violence Hotline and the National Sexual Violence Resource Center.

As CBS 2’s Otis Livingston reported Friday night, everyone was watching the news conference and taking notes – including the NFL players to whom Goodell has meted out justice.

What Roger just said is the exact same thing that players say when they make a mistake and plead their case

Meanwhile, body language expert Dinah Day said Goodell did not exude confidence.

“It wasn’t that I didn’t think he was being truthful, but he could have been stronger; could have been more convincing,” Day said. “I was really looking more at his face, which looked very kind of abashed, and like a little boy whose hand was caught in a cookie jar.”

National Organization for Women President Terry O’Neill repeated a call for Goodell to step down, saying there was nothing said Friday to increase confidence in his ability to lead the NFL.